Pulveriz ing-machine



2 SheetsSheet 1.

(No Model.)

R. D. GATES.

PULVERIZING MACHINE.

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(No Model.) 2 Sheets-Sheet 2.

' R. D. GATES.

PULVERIZING MACHINE. No. 320,126. Patented June 16, 1885.

Elmira Srarns ATENT @rrrcn.

RYEBSON D. GATES, OF CHICAGO, ILLINOIS.

PULVERIZING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 320,126, dated June 16, 1885.

Application filed January 21, 1885. (No model.)

To all whom, it may concern:

Be it known that I, RYnnsoN D. GATES, a citizen of the United States, residing at Chi cage, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pulverizing-Machines, which are fully set forth in the following specification, reference being had to the accompanying drawings, in which- Figure l is an elevation of a machine en1 bodying my invention; Fig. 2, a vertical central transverse section of the same; Fig. 3, a plan section taken on the line 00 0c of Fig. 2; Fig. 4, a detail view of the pulverizing-die detached; Fig. 5, a detail plan view of the eccentric-box detached; Fig. 6, an elevation of the same; and Fig. 7 a detail plan view of a portion of the upper dust-guard.

Like letters refer to like parts in all the figures of the drawings.

My invention relates to machines for pulverizing ore, stone, and other analogous mate rials which are capable of being reduced to a powder, itbeing in the nature of an improvement on the machine set forth in Letters Patent No. 56,793, issued to Henry Pierce, July 31, 1866, for a quartz-mill; and it consists in a die surrounding the gyrating pestle or cone of the said machine, and against which the said cone operates, the said die being capable of yielding in every direction horizontally, and being normally held up against the cone by spring-pressure.

It also consists in certain other novel features, which will be hereinafter described, and then specifically pointed out in the claims.

In the drawings, A indicates an outer casing suitably constructed, and B a shaft arranged therein and carrying a pulverizingcone, B, of suitable construction, rigidly secured thereon. The upper end of the shaftB is mounted loosely in an eccentric-box, O, to which latter is secured a bevel-gear, c, meshing with the pinion e on the driving-shaft C, while the lower end of the shaft B is provided with a ball-bearing or universal bearing of any improved construction, so that when the shaft 0 and eccentric O are rotated motion will be imparted to the shaft B and cone B, substantially as in the patent hereinbefore specified.

The bearing-block D, in which thelower end of the shaft B is mounted, may be vertically adjusted by means of the lever D, which is actuated by the hand-wheel d in an obvious manner in order to set the cone B at a proper height within the machine.

These parts just described may be of any approved construction, as they are common to all machines of the same general character, and are not of my invention.

WVithin the casing A, and surrounding the cone B, is arranged a cylindrical die, E, the extreme diameter of which is less than the interior diameter of that portion of the casing A which surrounds it, so that a space is left between its outer wall and the inner wall of the casing. The external form of this die is preferably cylindrical, as shown, to adapt it to fit within the casing, and it is supported between suitable inwardly-projecting flanges, a, on the casing, bearing-plates of any suitable metal or alloy being interposed between the flanges and the die. The interior of the die is hollow to receive the cone B, the aperture in the die being preferably beveled off in each direction from about its middle portion, as shown, the upper bevel, e, diverging from the surface of the cone, while the lower bevel, 6', corresponds substantially with the bevel of the cone.

Surrounding the die E, 011 the outer side thereof, is a series of thrust arms or rods, F, eight being shown in the present instance, although 1 contemplate using a greater or a less number, if such a construction be found advantageous. These thrust-arms are held in contact with the outer surface of the die by springpressure, so as to hold the said die normally in a central position within the casing A, but to allow it to yield in any direction in which it may be thrust by the cone B in its gyrating movement. The thrust-rods F project through the casing A, their outer ends being formed into heads f, provided with seats to receive the springs F. The outer end of each spring bears against a nut, F arranged between the arms of a bracket, A, secured to or forming a part of the casing A. Through this nut passes a threaded spindle, F, mounted in the outer end of the bracket A, by rotating which the nut F may be moved radially in or out between the arms of the bracket A to increase or diminish the tension of the spring F, the outer end of the spindle F being provided with a wrench-grasp or other suitable device to enable it to be readily turned; The spindle F is shown as extending some distance inward beyond the nut F and entering the thrust-rod F, which is made hollow for this purpose, and thus forms a guide and support for the inner end of the spindle, while at the same time the spindle passing through the center of the coils of the spring F prevents this latter from springing out of place laterally. It will be seen that by this device the pressure of the springs against the thrust-rods may be regulated so as to cause these latter to otter the exact degree of resistance desired to any motion of the die E, so as to hold this latter against the cone B with any desired force. One of the thrust-rods F is made somewhat longer than the remaining ones, and enters a groove, E, in the die E to prevent this latter from rotating, which it has a tendency to do, owing to its contact with the cone 13 while in operation.

Heretofore in machines of this general description, in which the material to be operated upon passes between a gyrating cone and a die surrounding the same, it has always been necessary, owing to the fact that the die is a fixed die, to leave a certain space between the cone and the die, and, owing to the existence of this space, large particles would pass through the machine without being reduced, it being impossible to adjust the cone so that it would be in actual contact with the die. By reason of the yielding die which I have devised, the cone and die may be'so arranged that they will be in actual contact with each other, whereby the material passing between them will be reduced much more effectually and to a much greater degree. One of the chief disadvantages of these machines as heretofore con structed is that the dust which arises from the breaking of the material finds its way into the bearings of the revolving parts, causing them to heat and cut and eventually destroying them. In order to provide an effectual dustguard for these bearings, I have devised the means shown more particularly in Fig. 2 of the drawings. The guard for the lower bearing consists of a grooved cup, G, surrounding the bearing and partially filled with water or other liquid by means of the pipe 9 or otherwise. Attached to the shaft B is a shield or guard, G, the depending flange of which enters the grooved cup G, and passes below the level of the liquid therein, acting, in conjunction with the said liquid, to form a dust-seal, which will effectually prevent any passage of dust from the body of the machine into the bearing. Below the upper bearing is arranged a similar grooved cup, H, supplied with water through the medium of the pipe h, and operated in conjunction with a similar shield or guard, H, attached to the shaft below the bearing. This upper cup H, however, is provided with two grooves, the lower one, It, to receive the water which forms the seal, and an upper one, h to collect the oil which drops from the bearing above it, the guard H being provided with an extension or flange, 7?, which extends over the said groove h in order to conduct the oil which falls from the bearing on the upper side of the shield to the groove. The oil, as it 'collects in this groove h is withdrawn therefrom by means of a pump, I, of any approved construction, connected to the said groove by means of a pipe, 2', and driven from the driving-shaft O, as shown in Figs. 1 and 2. The pump I withdraws the oil from the groove It, and returns it by means of a pipe, 'i, to the receptacle 1, above the upper bearing, which contains the lubricant for the said bearing.

It will be observed that the dust-seal of the cup H not only prevents any dust from passing from the body of the machine into the upper bearing, but it also prevents any passage of the oil from the said bearing into the body of the-machine, acting for this latter purpose in conjunction with the pump I,which returns the oil from the groove h to the bearing. This latter result is a very desirable one, more especially under certain circumstances-such,for instance, as where the machine is being used to pulverize an ore which must subsequently be submitted to other processes to extract the metal therefrom, with which processes the presence of any oil which might drip from the bearings would most materially interfere.

The operation of my machine will be readily understood from the preceding description. The material being fed in through suitable openings, a, passes down into the space between the upper portion of the cone B and the upper bevel, c, of the die E. As the cone successively approaches each portion of the interior of the die-the material between the die and cone is crushed and reduced in size, passing downward as it is reduced until it finally passes out at the bottom of the machine.

If desired, a screen or sifter of suitable construction may be arranged underneath the machine, operating in conjunction with an elevator, whereby any larger particles which may have passed through between the die and cone will be retained in the screen and carriedback by the elevator to be fed once more through the machine. As the cone moves in its path within the die, the die yields outward successively in every direction, being held up in contact, or practically so, with the cone by means of the springs, as hereinbefore described.

Although I have shown the springs which retain the yielding die in position as arranged in that particular manner which I have found IIO do not wish to limit myself to this particular form of die, as the ordinary form of die, provided with but a single bevel extending from top to bottom, may be employed.

It is also obvious that various mechanical modifications in the details of construction may be made without departing from the principle of my invention, and I therefore do not wish to be understood as limiting myself strictly to the precise details of construction hereinbefore set forth, and shown in the drawings.

It is obvious that the dust-guard hereinbefore described and shown in the drawings forms no part of my present invention,the same forming the subjectanatter of an application filed by me April 27, 1885, Serial No. 163,666, and I therefore make no claim thereto in the present application.

I am aware of Letters Patent No. 32,898, granted July 23, 1861, to George Seymour, in which is shown a machine for grinding corn, consisting of a revolving cone surrounded by a conical shell composed of separate yielding slats.

I am also aware of Letters Patent No. 35,036, in which is shown a grinding-mill consisting of a revolving cylinder surrounded by a series of yielding plates. I therefore do not wish to be understood as claiming anything set forth in the Letters Patent before cited.

Having thus described my invention, what I claim as new,aud desire to secure by Letters Patent, is

1. In a pulverizing-machine, the combina tion, with the gyrating pulverizing-cone, of a yielding die surrounding the same, substantially as and for the purposes specified.

2. In a pulverizing-machine, the combination, with the gyrating pulverizingcone, of a yielding die surrounding the same, and suitable springs to hold the said die up against the cone, substantially as and for the purposes specified.

3. The combination,with the gyrating cone 13, of the die E, surrounding the same, thrustrods F, and springs to hold the said thrustrods in contact with the said die, substantially as and for the purposes specified.

4. The eombination,with the gyrating cone B, of the cylindrical die E, surrounding the same, the casing A, provided with flanges a, upon which the die is supported, thrust-rods F, passing through the said casing,and springs bearing against the outer ends of the thrustrods to hold their inner ends in contact with the die, substantially as and for the purposes specified.

5. The combination, with the die E and the casing A, surrounding the same, of the thrust rods l passing through the casing and bearing against the die, the brackets A, having nuts supported between their arms, the springs F, bearing against the outer ends of the thrust-rods and against the nuts, and screw-spindles mounted in said brackets and passing through the nuts to adjust them in or out, substantially as and for the purposes specified.

6. The combination, with the casing Aand the hollow thrust-rods F, having heads f, and mounted in the said casing, of the brackets A, and spindles F, mounted in the brackets and extending into the hollow thrust-rods, the nuts F mounted on the spindles, and the springs F,arranged between the said nuts and the heads f, substantially as and for the purposes specified.

7. The combination, with the gyrating cone 13, of the cylindrical die E, surrounding the same, and the spring-impelled thrust-rods F, bearing against the said die, one of the said thrust-rods being extended to enter agroovc, E, in the die to prevent rotation of the same, substantially as and for thepurposes specified.

RYERSON D. GATES. lVitnesses:

J NO. 0. MAcGnEGon, \V. 0. Contains. 

